Abstract
Evolution of deformation and relaxation behaviors of a prototypical Cu46Zr46Al8 metallic glass was ex-plored by extensive creep tests under both physical aging and cyclic loading.Deep insights into the microstructure-induced dynamic heterogeneity which accommodates creep deformation were succes-sively revealed via experimental measurements and spectral analyses.An annihilation of local defects within metallic glass with increasing annealing time and cyclic numbers was observed through the re-duction of amplitude in both activation energy spectra and relaxation-time spectra,which were also ac-companied by an ascending value of βKWW.It is further found that the corresponding deformation units within the metallic glass do not disappear permanently,but are recoverable over the course of cyclic loading.The apparent suppressed relaxation process can be gradually alleviated with increasing resum-ing time between two consecutive cycles,behaving differently from physical aging,which indicates a notable discrepancy between thermal treatment and mechanical treatment.
基金项目
国家自然科学基金(51971178)
Natural Science Basic Research Plan for Distinguished Young Schol-ars in Shaanxi Province(2021JC-12)
fund of the State Key Laboratory of Solidification Processing in NWPU(SKLSP202017)
MICINN(FIS2017-82625-P)
Generalitat de Catalunya(2017SGR0042)
NETL
NSTL
维普
万方数据